* Add tests that stat symlinks
* Check follow first in stat
* Don't run tests on FreeBSD
It would be possible to get them to run on FreeBSD by avoiding
get_symlink_times, but the behavior we're testing is not
platform-specific, so it's fine to not test it on FreeBSD.
---------
Co-authored-by: Sylvestre Ledru <sylvestre@debian.org>
* Make fperm hold 6 digit octal permission. Set it to 4 digits when displaying
* Add test
* Make every permission 4 octal digits
* Change test name to be more suggestive
* chmod: merge two args in test
---------
Co-authored-by: Daniel Hofstetter <daniel.hofstetter@42dh.com>
Note in particular that `args_override_self` would *NOT* work here,
since it would in all cases cause `options::NAME` to override itself,
or interfere with `trailing_var_arg`.
The testcase tries to write to the stdin pipe while the process under
test is simultaneously exiting with an error code. Naturally, this is a
race, and we should ignore any stdin write errors. However, adding this
feature to the list makes it even more unreadable, and adds no real
value, so let's skip the input data entirely.
This was a GNU behavior bug:
```console
$ LC_ALL=C shuf -er
shuf: no lines to repeat
[$? = 1]
$ cargo run shuf -er # old, bad (unexpected success)
$ cargo run shuf -er # new
shuf: no lines to repeat
[$? = 1]
```
If the first four decimal digits are zero, GNU dd elides them altogether.
Here's an execution on my PC:
```console
$ for i in $(seq 20000); do LC_ALL=C gnu_dd if=/dev/null of=/dev/null \
2>&1; done | grep copied | grep -E ' [0-9]e'
0 bytes copied, 1e-05 s, 0 B/s
0 bytes copied, 9e-06 s, 0.0 kB/s
```
Our implementation conforms to this, resulting in the following CI flake:
```
---- test_dd::test_final_stats_unspec stdout ----
run: D:\a\coreutils\coreutils\target\x86_64-pc-windows-gnu\debug\coreutils.exe dd
thread 'test_dd::test_final_stats_unspec' panicked at 'Stderr does not match regex:
0+0 records in
0+0 records out
0 bytes copied, 8e-05 s, 0.0 B/s
', tests\by-util\test_dd.rs:280:10
stack backtrace:
0: rust_begin_unwind
at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library\std\src/panicking.rs:578:5
```
Of course, this is just an overly strict regex in the test. This was a
one-in-tenthousand flaky test.
